Envelop-machine



T. UMEDA.

ENVELOP MACHINE.

APPLICATION FILED JULY 16. 1919.

1,375,618. U Patented Apr. 19,1921,

fi F v a '14 1 15 km 13 M d \l J, K W M 4 m Inventor Toz'wkich/ I; Um edw;

TORAKIGHI UMEDA, OF TENNOJ'I-MURA, J APAN.

ENVELOP-MACHINE.

Application filed July 16,-

To all whom it may concern:

Be it known that TORAKIOHI UMEpA, a subject of the Emperor of Japan, residing at Tennoji mura, Prefecture of Osaka, Japan, has invented certain new and useful Improvements in Envelop-Machines, of. which the following is a specification.

This invention relates to an apparatus for making seamless envelops. The invention more particularly relates to apparatuses of this character in which perforate patterns or molds, conforming to the shape of the product, are placed in liquid pulp contained in a vat, the bottom of which communicates with a discharge pipe and carries a suction pipe extending to each mold, so that when the solution contained in the vat is withdrawn through the suction pipes and the discharge pipe, it is filtered through the molds thus leaving a film or thin layer of the pulp on the outer surface of each mold. The invention is an improvement on this type of apparatus.

In the knownapparatus, pulp is discharged through the mold, and the fiber of the pulp adheres to the mold, so as to inclose the latter, a vacuum is produced in the mold. If, owing to powerful suction, the vacuum produced is considerable, the layer of pulp deposited on the mold will be uneven, and a product of uniform thickness cannot be obtained. Furthermore, in such apparatus, a comparatively large force is required for lifting the frame supporting the molds, which latter are attracted to the bottom plate.

The foregoing defects are eliminated by when the liquid the apparatus according to the present invention, in which there is an air inlet pipe for the purpose of introducing airinto the mold, and, as a further improvement, an arrangement whereby the liquid pulp contained in the vat is free from disturbance, so as to allow the pulp fibers to adhere to the mold. This latter arrangement consists of two or more'horizontal partitions arranged in the lower portion of the vat and having perforations out of register with each other, and baffles by which the speed of flow of the pulp caused by the suction, may be efiiciently reduced.

In the accompanying drawings, an apparatus in accordance with this invention is illustrated in vertical section.

The liquid pulp is contained in a vat 1 Specification of Letters Patent.

Patented Apr. 19, 1921.

1919. Serial No. 311,343.

bottom of the vat and beneath them is a discharge chamber 10 adapted to be emptied through the pipe 8 controlled by valve 9. The upper ends of the branch pipes 5 are at a higher level than the upper ends of the suction pipes 11.

At the lower part of the vat there are horizontal partitions 12 in which are perforations out of register with each other. Battles 17 depend from the lower or lowest partition and extend upwardly from the bottom of the vat, in alternation with each other. Owing to these bafiles the path of the liquid pulp passing into the vat is lengthened and the speed of flow reduced. In the known apparatus referred to above, the liquid pulp is directly introduced at the bottom of the mold, so that the liquid pulp is agitated by the movement of the entering pulp and precipitation of the pulp fiber is prevented, while the fiber which may have adhered to the mold is washed ofi. Owing to this disturbance of the pulp the product is damaged. This defect is eliminated in the present apparatus by the partitions and battles aforesaid. The construction of the new apparatus is very simple and its management is facilitated owing to the short length of the portion of the suction pipe 11 which enters the mold 4. In the known apparatus heretofore mentioned, this portion of the suction pipe is of a length substantially equal to the length of the mold, and the discharge chamber moves vertically with all its accessories, so as to enable it to withdraw the liquid pulp through the mold while the latter is gradually descending. In the present apparatus a bottom cover 13 is provided at the lower end of each mold 4 and a carrier 15 is attached to the support- 7 a drawing the tion'pipes 11,:during the operation of withpulp into the discharge chamber ,10 and through the discharge pipe '8,

- the ulp fibers adhere uniformly around the strong and produce too high a vacuum with- Water is automatically expelled when the air adapted to discharge water with each other in the said in "the molds the thickness of fiber deposited around the molds will not be uniform, and

in consequence defective articles are ob tained. Furthermore, a comparatively large force will be required to lift the frame that supports the molds Since the bottom covers of the molds will be drawn by the vacuum against the partition 12.

It is to eliminate these defects, that the air inlet pipe 3 is provided. By opening this pipe, air is introduced into the interior of the molds 4, so as to break the high vacuum produced therein and although water enters into the branch pipe 5 during the suction of the pulp through the suction pipe 11, such inlet pipe 3 isopened. aving now particularly described and ascertained the nature of this said invention and in what manner the same is'to be performed, I declare that what I claim is 1. In an apparatusof the kind herein referred to for making seamless envelops, two or more horizontal partitions'in the lower part of the vat, perforations out of register partitions, and baflies in the path of the pulp admitted b'eneath the lower or lowest partition, for the purpose set forth, a v v In an apparatus of the kind herein referred to for making seamless envelops, a suction pipe extending a short way into the mold, the bottom of the.- latter being closed air-tight and the said pipe being fixed in relationship to the mold, for the purpose set forth.

3. An apparatus for making seamless envelops comprising ber arranged in said vat and carrying a plurality of perforate molds, pipeslocated in the vat and extending through the supportsaid pipes being ing device into said molds,

from said molds, and means for admltting air to the interior a vat, a supporting memsaidplates, and means for admitting air into the interior of said molds.

, 5. An apparatus of the kind defined by claim 4 in which the molds are provided with a supporting member, and a handle is secured to said supporting member to er: mit the molds to be simultaneously li ted from the Vat. 6. An apparatus for making seamless envelops comprising a vat, a plurality of pipe extending upwardly from the bottom of the Vat, means for creating suction within said pipes, stationary spaced partitions located within the vat and provided with unalined apertures, said pipes extending through said partitions and one'of said provided with plates which engage said pipes, baflies arranged between one of said partitions and the bottom of the vat for ca lsling liquid pulp to travel by a circuitous P 7 a plurality of perforate molds located within the vat and having their lower edges engaging said plates; an air pipe located in the vat and provided with branches opening into the interior of said molds, said branches having their upper ends at a greater height than the upper ends of said suction pipes, and means for controlling the air fed through said air ipe. a a p 7. An apparatus of the kind defined by claim 6 in which a supporting member is connected to the molds, and a handle is secured to the supporting member to permit the molds to be lifted from the vat. V In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribin Witnesses,

I TORAKIO I -II UMEDA Witnesses:

S. KAKJAGAWA, H. KoNno.

partitions being.

means for admitting pulp to said vat, 

